The U.S. Air Force is projecting a big dollar demand in the next decade for the service's F-15EX Eagle II fighter by Boeing [BA] and for modifications to existing F-15s worldwide. Beyond fiscal 2030, the Air Force would shift any F-15EX buys to the indefinite delivery/indefinite quantity (IDIQ) Eagle Crest contract. The service estimates that contract from fiscal 2027 to fiscal 2037 could be more than $18 billion for procurement of Air Force F-15EXs and upgrades and sustainment of F-15Es,…